13642660 has 24 divisors (see below), whose sum is σ = 28728000. Its totient is φ = 5442144.

The previous prime is 13642649. The next prime is 13642667. The reversal of 13642660 is 6624631.

It is a super-2 number, since 2×13642660² = 372244343751200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13642667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9297 + ... + 10663.

It is an arithmetic number, because the mean of its divisors is an integer number (1197000).

Almost surely, 2^13642660 is an apocalyptic number.

13642660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13642660 is an abundant number, since it is smaller than the sum of its proper divisors (15085340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13642660 is a wasteful number, since it uses less digits than its factorization.

13642660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1875 (or 1873 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 13642660 is about 3693.5971626586. The cubic root of 13642660 is about 238.9459562799.

The spelling of 13642660 in words is "thirteen million, six hundred forty-two thousand, six hundred sixty".